WM1811A Datasheet, PDF (249/328 Pages) Wolfson Microelectronics plc – Multi-Channel Audio Hub CODEC for Smartphones

Production Data
WM1811A
REGISTER
ADDRESS
R57 (39h)
AntiPOP (2)
BIT
LABEL
8:7 JACKDET_MODE
[1:0]
DEFAULT
00
JACKDET mode select
00 = Jack Detect disabled
01 = Jack Detect enabled
10 = Jack Detect enabled
11 = Jack Detect enabled
DESCRIPTION
MICDET (microphone/accessory detection) is not supported when
JACKDET_MODE = 10.
Analogue/Digital audio functions are not supported when JACKDET_MODE
= 01 or 10.
LDO1_DISCH must be set to 0 when JACKDET_MODE = 01.
Settings 01 and 10 must not be selected if AVDD1 or DCVDD is supplied
externally (ie. if LDO1 or LDO2 is not used).
6:5 VMID_RAMP [1:0]
00
VMID soft start enable / slew rate control
00 = Normal slow start
01 = Normal fast start
10 = Soft slow start
11 = Soft fast start
If VMID_RAMP = 1X is selected for VMID start-up or shut-down, then the
soft-start circuit must be reset by setting VMID_RAMP=00 after VMID is
disabled, before VMID is re-enabled. VMID is disabled / enabled using the
VMID_SEL register.
3
VMID_BUF_ENA
0
VMID Buffer Enable
0 = Disabled
1 = Enabled (provided VMID_SEL > 00)
2 STARTUP_BIAS_
0
Enables the Start-Up bias current generator
ENA
0 = Disabled
1 = Enabled
1
BIAS_SRC
0
Selects the bias current source
0 = Normal bias
1 = Start-Up bias
0
VMID_DISCH
0
Connects VMID to ground
0 = Disabled
1 = Enabled
Register 39h AntiPOP (2)
REGISTER
ADDRESS
R59 (3Bh)
LDO 1
BIT
LABEL
3:1 LDO1_VSEL [2:0]
DEFAULT
DESCRIPTION
110
LDO1 Output Voltage Select
2.4V to 3.1V in 100mV steps
000 = 2.4V
001 = 2.5V
010 = 2.6V
011 = 2.7V
100 = 2.8V
101 = 2.9V
110 = 3.0V
111 = 3.1V
w
PD, November 2013, Rev 4.1
249